std::hash for strong<T, Tag>

felixguendling · Apr 19, 2023 · b9b3a54 · b9b3a54
1 parent 7db292a
commit b9b3a54
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/include/cista/strong.h b/include/cista/strong.h
@@ -3,6 +3,7 @@
 #include <limits>
 #include <ostream>
 #include <type_traits>
+#include <utility>
 
 namespace cista {
 
@@ -187,4 +188,11 @@ class numeric_limits<cista::strong<T, Tag>> {
   static constexpr bool is_integer = std::is_integral_v<T>;
 };
 
+template <typename T, typename Tag>
+struct hash<cista::strong<T, Tag>> {
+  size_t operator()(cista::strong<T, Tag> const& t) const {
+    return hash<T>{}(t.v_);
+  }
+};
+
 }  // namespace std